Recent investigations disclose that semiconductor–ionic conductor materials (SIMs) as novel functional materials deliver superior ionic conductivity. However, SIMs are not utilized as electrolyte membranes in traditional fuel cells due to mixed ion–electron conduction. To address this issue, a Schottky fuel cell using In₂O₃–La/Pr‐doped ceria (LCP) SIMs as the electrolyte membrane is fabricated; such devices take advantage of the superior ionic conductivity of SIMs, combined with the band energy alignment to avoid short circuiting. Through adjusting the weight ratio of In₂O₃ and LCP, a supreme power density of 730 mW cm⁻² is obtained for the Schottky fuel cell operated at 550 °C, which also exhibits decent performance at low temperatures, namely, a power maximum of 370 mW cm⁻² even at 500 °C. The rectification curve verifies the existence of Schottky junction in the cell, the corresponding built‐in field prevents the electron from passing through the cell to eliminate short circuiting, and simultaneously promotes the ion across the interface between the electrolyte and anode. The results develop novel In₂O₃–LCP SIMs with superior conductivity and also demonstrate an efficient cell configuration based on SIMs, which proposes a potential strategy for the application of intermediate/low‐temperature solid oxide fuel cells.

中文翻译：

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基于In2O3–La / Pr掺杂的Ceria半导体离子导电材料电解质的高性能燃料电池

最近的研究表明，作为新型功能材料的半导体离子导体材料（SIM）具有出色的离子导电性。但是，由于离子-电子混合传导，SIM在传统燃料电池中并未用作电解质膜。为了解决这个问题，制造了使用In ₂ O ₃ -La / Pr掺杂的二氧化铈（LCP）SIMs作为电解质膜的肖特基燃料电池。此类设备利用了SIM的出色离子传导性，并结合了能带对齐方式来避免短路。通过调整In ₂ O ₃和LCP的重量比，最高功率密度为730 mW cm ^-2对于在550℃下操作的肖特基燃料电池获得了“ R”，其在低温下也表现出良好的性能，即，即使在500℃下也具有370mWcm ^-2的最大功率。整流曲线验证了电池中肖特基结的存在，相应的内置场阻止电子通过电池以消除短路，并同时促进离子穿过电解质和阳极之间的界面。结果开发出了具有优异电导率的新型In ₂ O ₃ –LCP SIM，并展示了基于SIM的高效电池配置，这为中/低温固体氧化物燃料电池的应用提出了潜在的策略。